[gnome-shell] (2 commits) Non-fast-forward update to branch wip/jimmac/login-back-button

[Marge Bot <marge-bot src gnome org>]

The branch 'wip/jimmac/login-back-button' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  13bb8bb... styling: Update for darker system grey

Commits added to the branch:

  095d7c3... Update German translation (*)
  db13361... styling: Update for darker system grey

(*) This commit already existed in another branch; no separate mail sent